The most challenging clock to program?

I'm going to revive this thread since I was just looking at using a Griswold DWS valve for use as a master. It is a bit cheaper than the 8200CR and has no screens to clog. Anyone have any experience with these valves?

I'm going to revive this thread since I was just looking at using a Griswold DWS valve for use as a master. It is a bit cheaper than the 8200CR and has no screens to clog. Anyone have any experience with these valves?

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I was not aware Griswold was still around..they were a player years ago &
I believe they had a pretty advanced (for its time) controller. Got a link?
The 8200 valve is sweetness..goes with the Calsense.

Remember the old Johns Manville controller with the DIP switches and the little log book attached to the face panel? Griswold had some that were kinda fun too. And don't forget some of those early Superior solid state models.
The MC+ is right up there with those brain-strainers.

I didn't read all of the posts but I'd say the hardest "clocks" to work with was the old hydraulic manifold Toro's like the VT-1 thru 4 series.
I used to service these old controllers on a golf course near me and they were always clogging at the junction inside of the cabinet. To clear them you had to have REAL quick fingers as the moment the line was separated the damn head popped up.
The cams always stuck and until one became proficient in knowing how much pressure to apply the risk of striping the teeth was a constant concern.
Not to mention every station in every satellite had to be timed perfect to avoid overlapping the run times and screwing up the coverage from too many heads running at the same time.
I still cringe when I hear that ratcheting noise.